Volunteer travel involves taking a trip all or part of the purpose is to participate in an arranged service opportunity helping others. Usually, these trips are arranged by church organizations, human interest groups, non-profits.
Charitable interests often go far beyond national (boundary) and sometimes, donating money is not enough (satisfy) the need to help. Volunteer travel is a way to combine a visit to a new location with meaningful work that has a direct impact communities in other parts of the world.
This type of travel has been option for many years. (historic), church groups made up a large part of this market. Once a year a religious organization would organize a trip to another country. The primary purpose of the trip was very specific. For example, it would be to help build a school, dig wells or engage in hundreds of other projects that would impact those less fortunate.
As international travel becomes by far (easy), volunteering in other countries has become as (access) as browsing a website and signing up. This sort of volunteer travel (refer) to as voluntourism or vacanteerism from time to time.